Fbiedeich edtjabd lang



(No Modell) 4 F. E. LANG.

.PRINTER'S INK ROLLER.

' Patented Aug. 14, 1888.

UNITED STATES PATENT EEICE.

FRIEDRICH EDUARD LANG, OE ANGER, NEAR 'LEIrsIG sAXoNY, GERMANY.

PRINTERS INK-ROLLER.

SPECIFICATION forming part of Letters Patent No. 387,647, dated August14, 1888. Application filed September 2G, 188,7. Serial No. 250,748. (Nomodel.)

To @ZZ whom it may concern:

Be it known that I, FRIEDRICH EDUARD LANG, a subject of the King ofSaxony, and a resident of Anger, near Leipsie, Saxony, Germany, haveinvented a new and useful Improvement in Printers Ink-Rollers, of whichthe following is a specification.

This invention consists in an improved roller for transferring ink orcolor to designs, type, &c., in printing-presses, and more especiallyfor use in lithographie and Zincographic printing. For this purposeleather cylinders have generally been used. These, however, have severaldrawbacks. For instance, the leather surface generally lacks evenness,owing to the inequalities produced in graining the leather, so that thetransfer of ink or color to the design is deficient and unequal. Thus itis found that only about half the cylinders prepared are equal to thepurpose. Again, the leather expands in use, so that it becomes loose onits support and th-e rollers lose their solidity. The leather,furthermore, is liable to take up water from the lithographie stone orthe like during the process, and thereupon to become smooth and slideover the designs, 85e., thereby tending to smudge the same or impair theoutlines. The leather cylinder is also generally stuffed or backed withiiannel, and the latter sucks up any ink or eolorthat may permeatetheleather, becoming hard and thus depriving the roller of itselasticity. Composition rollers are also used.

Reference being made to the accompanying drawings, Figure 1 is across-section, Fig. 2 a longitudinal section,and Fig. 3 an end view, ofa printers ink hand-roller made according to my invention. Fig. 4 is alongitudinal section of a machine-roller.

The improved cylinder or roller is formed of or with a surface, A, ofspecially-prepared felt, as hereinafter described.

The improved felt cylinder is intended to re move the aforesaidinconveniences. It surin durability, and also in The felt cylinder doesnot expand like leather and is not altered by impregnation with color.Furthermore, the action of water on the felt does not cause it to slideover the design to the detriment of the latter. The improved cylinderis, moreover, provided with an impermeable layer, B, between the feltouter casing and the backing C, of flannel or the like, where suchbacking is used. The ink therefore cannot pass to impregnate suchbacking, and the latter therefore lasts longer than would otherwise bethe case.

vThe improved roller consists of a roller or cylinder, D, of wood ormetal, the same being, if desired, covered with flannel C and theprotecting-layer B aforesaid,and over this the prepared felt A, or, inplace thereof, with prepared felt only.

The backing O,where such is used, may be of 65 flannel or cloth woundabout the roller D, the protecting-layer B being of oil-silk, oil-cloth,or waterproofed fabric of convenient nature.

The felt layer A is saturated with a mixture composed of substantiallyequal parts of relined beef-tallow, Gopal-lac, and varnish, the saidsubstances having been well mixed and stirred in an equal quantity ofturpentine-oil.

The roller when dry is ground and smoothed. E represents the inkthereon.

I claim as my invention- An ink or color roller for printing, having asurface composed of felt saturated with a mixture of beef-tallow,eepallae ,varnish, and turpentine-oil.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

FRIEDRICH EDUARD LANG.

"Witnesses:

EDMUND ZAoHs, MAX MATTHAI.

passes the leather grain or surface.

